Searching for the true killer of Count Drebber, Sherlock and John set a trap for the culprit using a wedding ring found at the murder scene as bait. After a struggle in which the ring is lost, Sherlock is able to deduce who the real killer is.
Then who on earth was it?
من كان إذا؟
Und wer zum Henker war es?
Entonces, ¿quién diablos lo hizo?
Mais de qui s’agit-il ?
Então, quem foi?
Но как? Кто же он?